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by Gavinmc42
Mon Jul 15, 2019 10:35 am
Forum: General discussion
Topic: Designing real electrical car
Replies: 13
Views: 456

Re: Designing real electrical car

Body Electrics is the term for stuff not connected to the engine or drive system. Climate control, lighting, RC locking, electric windows, radio and camera etc. When you include electric cars then BMS's, battery management systems are needed. Normally this is integrated with the charging system and ...
by Gavinmc42
Mon Jul 15, 2019 7:09 am
Forum: OpenGLES
Topic: :? - Im comfused i need som info on PI4 and GL|ES
Replies: 4
Views: 234

Re: :? - Im comfused i need som info on PI4 and GL|ES

Confused? join the club ;) A search will not find much yet on this. Some are further along than others. With the Pi4 OpenGL will be the starting point. The source for that open driver is in the mesa code. Not sure if or when VC6 OpenGLES/VG stuff will show up. I already run OpenGL games, some are ok...
by Gavinmc42
Mon Jul 15, 2019 6:41 am
Forum: General discussion
Topic: Designing real electrical car
Replies: 13
Views: 456

Re: Designing real electrical car

Find your nearest Formula E company and visit them?
https://www.fiaformulae.com/
by Gavinmc42
Mon Jul 15, 2019 6:07 am
Forum: General discussion
Topic: Designing real electrical car
Replies: 13
Views: 456

Re: Designing real electrical car

What car has heat and motion sensing? Kit? Do Tesla's have that yet? Is it just monitoring or are you going to do full 100KW+ 3phase motor control? Mainboard? Going to need more that just one PCB. You can send me videos, PDFs or lecture about this topic) Or you could goolge this yourself and save us...
by Gavinmc42
Mon Jul 15, 2019 3:22 am
Forum: RISCOS
Topic: Proposal to show speed of RISC OS compared to Linux.
Replies: 59
Views: 1830

Re: Proposal to show speed of RISC OS compared to Linux.

Tell me about the shell scripting.
I noticed there was a headless version that was only 3.8MB.
But I did not see any source, so it is not open?
by Gavinmc42
Mon Jul 15, 2019 2:45 am
Forum: General discussion
Topic: Raspberry and electricity
Replies: 16
Views: 826

Re: Raspberry and electricity

Not really for server usage but for 24/7 Pi data logger gadgets I use PiCore Linux. PiCore runs from ram so power outages don't cause OS errors. I might lose some data but no big deal as it is only temperature data. I get an email if it reboots, that way I know it there was a power outage. These uni...
by Gavinmc42
Mon Jul 15, 2019 12:51 am
Forum: General programming discussion
Topic: Comparing Interpreted Language Speed.
Replies: 55
Views: 1585

Re: Comparing Interpreted Language Speed.

Until recently I had been ignoring the TCL/TK combo.
Too retro for me?
Turns out tcl is small enough to get embedded in small systems.

It also seem to be available on most systems.
Is it portable to RISC-OC?
TK the graphics part seems to get used by Python etc.

So Lua is in but Luajit is out?
by Gavinmc42
Sun Jul 14, 2019 9:49 am
Forum: OpenGLES
Topic: RPi4 Problem drawing GL_POINTS anyone?
Replies: 23
Views: 551

Re: RPi4 Problem drawing GL_POINTS anyone?

A grep does not find that combo in the mesa examples.

A google finds the docs with minimal examples, but you probably know that already.
http://docs.gl/gl2/glDrawElements
by Gavinmc42
Sun Jul 14, 2019 8:25 am
Forum: Gaming
Topic: Deep Platformer
Replies: 1
Views: 131

Deep Platformer

Sometimes code is written so well it just works. Install fpc, then lazarus Download Deep Platformer, compile it, then run. https://forum.lazarus.freepascal.org/index.php/topic,44908.120.html If I knew how to do screen capture on Pi's there would be a picture of it working here. All done on a Pi4 :D ...
by Gavinmc42
Sun Jul 14, 2019 7:25 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 291
Views: 58184

Re: Raspberry Pi 4 temperature

Those little heatsinks make a big difference, it is the surface area that helps.
by Gavinmc42
Sun Jul 14, 2019 7:08 am
Forum: Bare metal, Assembly language
Topic: BARE METAL VC 4 Video Decoding
Replies: 6
Views: 392

Re: BARE METAL VC 4 Video Decoding

They have gone for software decoding on the Pi4 as the ARM core are now fast enough.
Look in the source of ffmpeg/VLC?

VC4 uses the hardware but you could try software decoding on a 3B+?
Might be ok for 480 line res?
by Gavinmc42
Sun Jul 14, 2019 7:03 am
Forum: Advanced users
Topic: Cross compile 64 Bit Kernel for Pi4
Replies: 2
Views: 278

Re: Cross compile 64 Bit Kernel for Pi4

Not many people have done this.

Might be clues here.
https://www.raspberrypi.org/forums/view ... r+Gentoo64
by Gavinmc42
Sun Jul 14, 2019 6:46 am
Forum: Raspbian
Topic: Stable 64 bit (arm v8) Raspbian buster on pi 4?
Replies: 3
Views: 407

Re: Stable 64 bit (arm v8) Raspbian buster on pi 4?

Not yet, you might have to wait. And it probably won't be RPF's Raspbian Buster as the first 64bit Pi4 OS. Keep your eye on this Gentoo forum. https://www.raspberrypi.org/forums/viewforum.php?f=54 Sakaki has already shown some pics of a prerelease version for the Pi4. But the Pi4 does not USB or Net...
by Gavinmc42
Sun Jul 14, 2019 6:33 am
Forum: OpenGLES
Topic: RPi4 Problem drawing GL_POINTS anyone?
Replies: 23
Views: 551

Re: RPi4 Problem drawing GL_POINTS anyone?

I had forgotten your test, really am getting old fast.
So much to learn on these new Pi4's.

Any clues here?
https://www.raspberrypi.org/forums/view ... dy#p331264
by Gavinmc42
Sun Jul 14, 2019 6:12 am
Forum: Bare metal, Assembly language
Topic: Raspberry Pi 4
Replies: 46
Views: 4268

Re: Raspberry Pi 4

Is it the VC6 booting first on the Pi4?
Does the Boot EEPROM use ARM or VC6 code?
by Gavinmc42
Sun Jul 14, 2019 6:03 am
Forum: RISCOS
Topic: Proposal to show speed of RISC OS compared to Linux.
Replies: 59
Views: 1830

Re: Proposal to show speed of RISC OS compared to Linux.

I would actually like to see more Pascal on RISC OS. Free Pascal is reasonably portable, Lazarus less so. There are alternative IDE's, even a text version. I'm watching this progress https://wiki.freepascal.org/AmigaOS One way to get FPC is to compile a small version of FPC with gcc. This then comp...
by Gavinmc42
Sun Jul 14, 2019 4:13 am
Forum: OpenGLES
Topic: RPi4 Problem drawing GL_POINTS anyone?
Replies: 23
Views: 551

Re: RPi4 Problem drawing GL_POINTS anyone?

Paddy, I'm still having problems compiling the mesa demos. Was hoping to use them as a starting point for OpenGL coding. Had no issues with Gentoo64 on the 3B+, but this Buster/Pi4 is a little different. No luck yet with the Laz/FPC OpenGL examples either. Been impressed with the WebGL performance i...
by Gavinmc42
Sun Jul 14, 2019 12:32 am
Forum: Raspbian
Topic: FreeCAD on PI4 and Raspbian Buster.
Replies: 35
Views: 1527

Re: FreeCAD on PI4 and Raspbian Buster.

I didn't try to actually do anything, I just loaded the GUI, I thought that was what at least some people were having trouble with.
Nope the GUI is fine now, we can sit and stare at it for ages :D
It is just when you create a new file it crashes and vanishes.
by Gavinmc42
Sat Jul 13, 2019 11:42 am
Forum: RISCOS
Topic: Proposal to show speed of RISC OS compared to Linux.
Replies: 59
Views: 1830

Re: Proposal to show speed of RISC OS compared to Linux.

Only played with the standard stuff in RISC-OS. Linux, I can do lots with just shell script. Ultibo is an OS, It is a bit like Arduno, I write a setup(initialise) and then the main loop(run). All the low level stuff is the OS, but the highest level is the application. I don't actually care about the...
by Gavinmc42
Sat Jul 13, 2019 10:51 am
Forum: Beginners
Topic: Controlling the Pi with Android via Bluetooth
Replies: 6
Views: 125

Re: Controlling the Pi with Android via Bluetooth

Here is one way - Episode 6
https://ultibo.org/make/

Many other ways to run a webserver on a Pi3 and control it with anything that has network access.

Does the new Buster release upgrade the 3B+ WiFi/BT chip to 5.0 as well?
BT5.0 has some interesting interface options.
by Gavinmc42
Sat Jul 13, 2019 10:10 am
Forum: Troubleshooting
Topic: I can´t boot from usb in pi 4
Replies: 74
Views: 4060

Re: I can´t boot from usb in pi 4

I found the Pi4 release perfect timing as my home PC running Linux Mint died the day my first Pi4 arrived. My biggest beef is Warzone2100 won't run 4 player maps without going psychedelic on me. Previously half the map was black, so it is getting better ;) Got a USB dock and had trouble getting it g...
by Gavinmc42
Sat Jul 13, 2019 9:50 am
Forum: Java
Topic: Is NetBeans best IDE for Pi 4 today or is usable Eclipse too?
Replies: 9
Views: 258

Re: Is NetBeans best IDE for Pi 4 today or is usable Eclipse too?

Go RAD, Lazarus and FPC. I use the baremetal version Ultibo. Probably the fastest way I have now for making apps without an OS being needed. I have not tried Netbeans on a Pi4, but I have used it Windows networked to a Pi. I used it quite a bit until it went open. If you like Java, Processing is pro...
by Gavinmc42
Sat Jul 13, 2019 9:30 am
Forum: Bare metal, Assembly language
Topic: BCM2711B0
Replies: 30
Views: 1489

Re: BCM2711B0

I don't know enough of this stuff. Maybe you can answer this question Can 3 cores run 64bit and one run 32bit? There is all these various stubs around ARM6, ARM7, ARM8. They would be for core 0? "out of order execution" Not even going to try to figure that stuff out. That 512KB boot EEPROM is so cal...
by Gavinmc42
Sat Jul 13, 2019 9:14 am
Forum: RISCOS
Topic: Proposal to show speed of RISC OS compared to Linux.
Replies: 59
Views: 1830

Re: Proposal to show speed of RISC OS compared to Linux.

I found RISC-OS nice and fast but a bit retro looking. For most of my stuff the requirements are single purpose applications. Multi-user is not relevant. What is the point of speed tests? Some of my stuff runs on B+'s and max out at 2% cpu usage. Cpu/OS speed is is not relevant as much as speed of d...
by Gavinmc42
Sat Jul 13, 2019 8:43 am
Forum: Troubleshooting
Topic: Raspberry pi 4 - Not working Raspbian OS
Replies: 6
Views: 256

Re: Raspberry pi 4 - Not working Raspbian OS

If the green led is not flashing then the uSD card maybe the issue.
I sometimes find the contacts get dirty, I just rub them with my thumb, the fingerprint grooves are a tiny bit abrasive.

I almost always find it is the uSD card or the power supply.

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